JADES-GS-z14-0, a galaxy discovered by the James Webb Space Telescope, already contained oxygen less than 300 million years after the Big Bang — a finding confirmed by ALMA, suggesting generations of massive stars had already been born, lived and died, scattering newly forged elements into space billions of years before our Sun existed.

JADES-GS-z14-0, a galaxy discovered by the James Webb Space Telescope, already contained oxygen less than 300 million years after the Big Bang — a finding confirmed by ALMA, suggesting generations of massive stars had already been born, lived and died, scattering newly forged elements into space billions of years before our Sun existed.

ALMA detected ionised oxygen in a galaxy seen before the universe was 300 million years old, supporting rapid stellar enrichment while leaving its exact history open.